hi anthony, are you in the uk? not familiar with any of the models you list, the cobra mt 250 said it powered by a kawasaki engine 26cc. the other looks to have a bigger displacement 52cc? the sgs doesn't mention who makes their engine. that could be issues with parts. are there any other choices?

I had to look up strimmer. It is a string trimmer also called a weed eater or weed whacker.

it's a "foreign" thing. the unit's are priced right.